JPH1070472A - Wireless microphone system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a wireless microphone system with a function of adjusting a loud sound volume generated from a tuner in a wireless microphone, thereby preventing howling and enabling appropriate volume adjustment. SOLUTION: A wireless microphone is provided with a sound level control signal generating means and a means for superimposing the control signal on a transmission signal, and the tuner controls a loudspeaker output level based on the sound level control signal. Means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a wireless microphone system, and more particularly, to a wireless microphone system having a function of adjusting a volume from a microphone body.

[0002]

2. Description of the Related Art Conventionally, there has been provided an apparatus which is called a wireless microphone and has means for transmitting a microphone signal by wireless means and means for receiving the microphone signal and outputting a loudspeaker. Is widely used in various situations. FIG. 6 is a block diagram showing an example of the configuration. That is, as shown in the figure, the conventional wireless microphone system includes a combination of a wireless microphone 1 and a tuner 2, and the tuner 2 has an antenna AN.
T, a speaker 3 and a volume control device 4 are provided. A radio wave output via the antenna ANT of the wireless microphone 1 is received by the tuner side ANT, an audio signal from the microphone obtained by demodulation is amplified, and then output from the speaker 3 as audio. At this time, as a wireless medium transmitted from the wireless microphone 1, various means such as an ultrasonic wave and an infrared ray can be considered in addition to a radio wave, and according to each communication medium,
The configuration of the transmitting / receiving means is appropriately selected.

However, in such a conventional wireless microphone system, adjustment of the sound level emitted from the tuner 2 is performed by operating a volume knob or the like provided on the tuner main body 2, so that the tuner 2 is held while holding the microphone. It has to be moved to the installation position, and howling caused by approaching the loudspeaker cannot be avoided. Further, in order to more accurately adjust the volume, it is preferable to perform the adjustment while listening to the volume at a position away from the loudspeaker by a required distance, but in the conventional device, it is inconvenient that several operators are required to perform the adjustment. was there.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the conventional wireless microphone system, and makes it possible to adjust the volume without approaching a loudspeaker or a tuner. By
It is an object of the present invention to provide a wireless microphone system that avoids howling and the like and is excellent in operability.

[0005]

In order to achieve the above object, a wireless microphone system according to the present invention basically comprises a wireless microphone and a tuner which receives and demodulates a signal transmitted from the microphone and outputs a loudspeaker. In the wireless microphone system, the wireless microphone includes a sound level control signal generating means, and a means for superimposing the control signal on a transmission signal, and the tuner has a sound output level based on the sound level control signal. Is provided.

According to a second aspect of the present invention, in the wireless microphone, the wireless microphone includes a switch for activating the audio level control signal generating means and increasing or decreasing the control level.

According to a third aspect of the present invention, the signal transmitting means from the wireless microphone to the tuner is obtained by digitally modulating a carrier with a signal to be transmitted.

According to a fourth aspect of the present invention, in a wireless microphone system comprising a wireless microphone, a tuner for receiving and demodulating a signal transmitted from the microphone and outputting a loudspeaker, and a voice monitoring device, the wireless microphone has a voice level control. Signal generating means and means for superimposing the control signal on a transmission signal; the tuner having means for controlling a loudspeaker output level based on the audio level control signal; the sound monitoring device having audio pickup means and the picked-up audio level. And a light-emitting means for turning on the light in accordance with the conditions.

According to a fifth aspect of the present invention, in a wireless microphone system comprising a wireless microphone, a tuner for receiving and demodulating a signal transmitted from the microphone and outputting a loudspeaker, and an audio monitoring device, the wireless microphone has an audio level control. Signal generating means and means for superimposing the control signal on a transmission signal; the tuner having means for controlling a loudspeaker output level based on the audio level control signal; the sound monitoring device having audio pickup means and the picked-up audio level. It is characterized by comprising means for wirelessly transmitting information to the tuner.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments. FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, reference numeral 11 denotes a wireless microphone main body according to the present invention, which is different from the configuration of FIG. Further, reference numeral 12 denotes a tuner, which can receive a wireless communication medium transmitted from the wireless microphone 11,
The communication medium, for example, a radio wave is received and demodulated to obtain an audio signal transmitted from the microphone side, amplified to a required level by an amplifier, and then output a loudspeaker through the speaker 13. The volume adjustment in the present invention can be performed by operating a volume adjustment button provided on the wireless microphone 15 in addition to the volume adjustment provided on the tuner body 12 as in the related art. That is, when the volume control button 15 of the wireless microphone 15 is operated, a control signal is superimposed on the wireless medium in accordance with the operation and transmitted to the tuner. This control signal is demodulated in the tuner 12 in the same manner as the audio signal, is supplied to a built-in audio control block, and has a function of increasing or decreasing the output audio level, similarly to the case where the volume 14 is operated. Thus, the user with the wireless microphone can arbitrarily select the tuner 1 from a remote location without having to approach the tuner body.
2 can adjust the volume of the loudspeaker output.

FIG. 2 is a diagram showing an example of the external configuration of a wireless microphone used in the above-described present invention. The wireless microphone shown in this example is a power switch 21 for adjusting the volume in addition to the power switch 21 normally provided conventionally. Up / down switches 22 and 23 are provided. By operating this switch, a control signal for audio adjustment is transmitted while being superimposed on a carrier wave. FIG. 24 shows a light emitting means such as a light emitting diode, which is turned on when the power is turned on. A configuration in which the button operation can be confirmed by blinking the light emitting means while the up / down switches 22 and 23 are being depressed will also be effective in ensuring the operation.

FIG. 3 is a block diagram showing a more detailed embodiment of the present invention.
And (b) is a block diagram of the tuner body.

First, a wireless microphone block includes a microphone 31 for converting an audio signal into an electric signal, an A / D converter 32 for converting the electric signal into a digital signal,
A multiplex converter 33, an up / down switch 34 for adjusting the volume, a check code circuit 35 for adding a CRC code to the multiplex conversion output signal, a modulator 36 for superimposing the multiplex signal on a carrier wave, And a transmission power unit 37 for amplifying the carrier.

On the other hand, the tuner block 12 shown in FIG. 1B includes a receiving high-frequency amplifier 38 for amplifying a signal from the microphone block received by the antenna ANT, a demodulator 39 for extracting a multiplex signal from a carrier wave, A frame detector 4 extracts a predetermined frame signal from the demodulated signal and detects a check signal to determine whether there is a code error.
0, a multiplex demodulation unit 41 for further separating a multiplex signal from the demodulated signal, and a D / A for converting a digital signal into an analog signal.
A converter 42, an electronic level controller 43 for controlling the level of the converted analog signal, a speaker amplifier 44 for amplifying the analog audio signal to a required level, and an out-of-synchronization signal output from the frame detector 40, for example, C
An inhibit circuit 45 for receiving an RC error signal and a control signal output from the multiplex demodulator 41 to generate an inhibit signal, an up / down switch 47 for volume control, and a logical sum of the switch output and the inhibit signal. An output OR circuit 46 is provided, and the electronic level controller 43 is controlled by the output of the OR circuit.

The operation and control example of the wireless microphone system thus configured will be described.

First, in the wireless microphone 11, a voice uttered by a user is converted into an electric signal by a microphone 31, and this electric signal is further converted into an A / D signal.
The digital signal is converted by the converter 32.

The audio signal converted into the digital signal is arranged at a required position of the frame in the multiplex converter 33, and at the same time, when the up / down switch is operated, the volume control signal is converted to a specific signal in the multiplex converter. It is arranged at the frame position. The multiplex-converted signal is added with a check signal such as a CRC for each frame, then superimposed on a carrier by a modulator 36, further power-amplified to a predetermined level, and transmitted via an antenna.

Various methods are known for converting signals into digital signals. For example, if a digital telephone modulation method, which has recently been adopted as a digital portable telephone modulation method, is used, a secret to a third party can be obtained. The effect is also obtained, and as the digital modulation method, for example, TDMA, QPSK, DP
Various modulation schemes such as SK, DQPSK, ADPCM and the like are known.

On the other hand, this carrier is guided to a reception high-frequency amplifier 38 via the antenna of the tuner 12 and is amplified to a required level. Then, the demodulator 39 restores the multiplexed audio digital signal from the carrier. The signal demodulated into the digital signal is separated into a check signal such as CRC by the frame detecting section 40, and the audio signal is restored to the digital signal corresponding to the original audio signal by the multiplex demodulating section 41, The signal becomes an analog audio signal via the / A converter 42. The audio signal demodulated into an analog signal is adjusted to a required audio level by the electronic level controller 43, amplified by a speaker amplifier 44 into a desired level of an electric signal, and then converted into audio from a speaker (not shown) and output.

The out-of-synchronization CRC error signal generated based on the CRC check signal separated by the frame detection unit 40 and the audio control signal separated by the multiplex demodulation unit 41 are supplied to an inhibit circuit 45. You. In the inhibit circuit 45, the synchronization loss CR
When the C error signal is not generated, the voice control signal is transmitted to the electronic level controller 43 via the OR circuit 46. However, when the CRC error signal is generated, the voice control signal is cut off. As described above, the reason why the voice control signal is interrupted in the out-of-synchronization state is that when the correct voice control signal cannot be obtained in the out-of-synchronization state, the voice control is performed erroneously, resulting in an unexpectedly high volume. This is to avoid a problem.

The tuner is provided with an up / down switch 47 so that the volume can be directly adjusted from the tuner itself.

As described above, according to the above-described embodiment, the wireless microphone is provided with the means for generating a signal for adjusting the volume, and the tuner detects the signal and controls the volume output from the speaker. With such a configuration, the volume can be controlled from a position away from the tuner.

The present invention can be modified as follows. That is, FIG. 4 is a schematic block diagram showing another embodiment of the present invention. The feature of this embodiment is that a volume level monitoring device 41 is further provided. The volume level monitoring device includes a microphone 42 for converting a voice into an electric signal, a radio transmission antenna, a unit for generating level information of a voice signal detected by the microphone 42, and a radio unit for transmitting the volume signal level information. , And / or means for transmitting to the tuner 12 or / and the wireless microphone 11. Further, the tuner and / or the wireless microphone 11 includes a unit for receiving a signal transmitted from the audio level monitoring device. The functions of the wireless microphone 11 and the tuner have the same functions as those of the first invention described above.

In the second aspect of the present invention having the above-described configuration, if the voice monitoring device 41 is arranged at a desired location such as a hall where a loudspeaking method is performed using the system, the voice monitoring device 41 can be located far from the tuner. Can be known by a tuner or a wireless microphone. Therefore, if the above-described remote control function of the volume from the wireless microphone is used together, it is convenient for performing a further desired volume adjustment.

When the wireless means for transmitting the volume level information from the audio level monitoring device 41 to the wireless microphone or the tuner is the same as the wireless means for transmitting from the wireless microphone, the wireless means having different frequencies so as not to interfere with each other. Or both are time division multiplex communication means,
Synchronization will need to be ensured so as not to interfere. Also,
If the communication means between the audio level monitoring device and the wireless microphone or tuner is another different wireless medium such as ultrasonic waves or infrared rays, the object can be achieved without mutual interference.

FIG. 5 is a block diagram showing still another embodiment of the present invention. A feature of the wireless microphone system shown in this example is that the sound level monitoring device includes a light emitting unit whose light emission level changes according to a detected sound level. That is, the wireless microphone 11 and the tuner 12 each include an audio adjustment remote control unit as in the first embodiment described above, and the audio level monitoring device 51 includes a microphone 52 that converts audio into an electric signal, It includes a unit for generating level information of the audio signal detected by the microphone 52, and a light emitting unit 53 whose light emission amount changes according to the volume signal level information.

According to this configuration, the sound of the tuner can be remotely controlled from the wireless microphone as in the above-described embodiment, and the monitoring device can be visually controlled by the sound level monitoring device disposed at a required distance from the tuner. Can be monitored. Therefore, the object can be achieved with a simpler configuration than in the second invention.

In addition to the light emitting means, the light emitting amount is changed in accordance with the volume level, the light emitting means is changed in light emitting color, or a plurality of light emitting elements are arranged side by side, and the number of light emitting elements corresponding to the volume is changed. There are various types such as those that light up. In short, the object of the present invention can be achieved by any means capable of visually confirming the volume level.

Further, the present invention is not limited to the above-described embodiment, but can be variously modified. For example, a display device such as a liquid crystal is added to the wireless microphone, and when the second embodiment of the present invention is carried out, the audio level monitoring device is used. If the level is displayed based on the transmitted audio level information, even if the display cannot be confirmed when talking to the microphone, the sound is transmitted from the monitoring device after speaking to the microphone on a test basis. By receiving the received sound level information and viewing the displayed content based on the received sound level information, it is possible to confirm at what volume the sound has been transmitted to the monitoring device.

[0030]

Since the present invention is configured as described above, in the wireless microphone system, the tuner output sound level can be arbitrarily controlled from a position away from the tuner each time. Therefore, there is no problem such as howling caused by approaching the loudspeaker while holding the microphone as in the related art, and the volume can be controlled while confirming the volume at a desired position, so that more accurate volume adjustment can be performed. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an external view showing a specific configuration example of a wireless microphone used in the present invention.

FIG. 3 is a block diagram showing a specific embodiment of the present invention, wherein (a) is a block diagram of a wireless microphone, and (b) is a block diagram of a tuner.

FIG. 4 is a block diagram showing a modified embodiment of the present invention.

FIG. 5 is a block diagram showing another embodiment of the present invention.

FIG. 6 is a block diagram showing a conventional wireless microphone system.

[Explanation of symbols]

1, 11 ... wireless microphone, 2, 12 ...
Tuner, 3, 13 speaker, 15 volume control button, 41, 51 audio level monitoring device.

Claims (5)

[Claims] 1. A wireless microphone system comprising a wireless microphone and a tuner for receiving and demodulating a signal transmitted from the microphone and outputting a loudspeaker sound, wherein the wireless microphone has an audio level control signal generating means, and the control signal is supplied to the wireless microphone. Means for superimposing on a transmission signal, and wherein the tuner includes means for controlling a loudspeaker output level based on the audio level control signal. 2. The wireless microphone system according to claim 1, wherein said wireless microphone includes a switch for activating said audio level control signal generating means. 3. The apparatus according to claim 1, wherein said means for transmitting an audio signal from said wireless microphone to said tuner digitizes the audio signal and modulates a carrier with a digitized signal. Wireless microphone system. 4. A wireless microphone, a tuner for receiving and demodulating a signal transmitted from the microphone and outputting a loudspeaker sound,
In a wireless microphone system comprising an audio monitoring device, the wireless microphone has an audio level control signal generating means and a means for superimposing the control signal on a transmission signal,
The tuner includes a unit that controls a loudspeaker output level based on the audio level control signal.The audio monitoring device includes a unit that picks up audio output from the tuner and a light emitting unit that lights up according to the audio level picked up. A wireless microphone system equipped with each. 5. A wireless microphone, a tuner for receiving and demodulating a signal transmitted from the microphone and outputting a loudspeaker sound,
In a wireless microphone system comprising an audio monitoring device, the wireless microphone has an audio level control signal generating means and a means for superimposing the control signal on a transmission signal,
The tuner has means for controlling a loudspeaker output level based on the audio level control signal, the audio monitoring device has means for picking up audio output from the tuner, and information on the audio level picked up by the tuner or the wireless microphone. Wireless microphone system, characterized in that the wireless microphone system is provided with means for wirelessly transmitting the signals.